Complete and utter bollocks
This is complete and utter bollocks from Airbus.
Engines are podded forward of the wing main-spar for a reason (uncontained failures do still happen) and the regulators won't be changing that requirement, probably ever, especially on engines that "need" less servicing.
Formation flying is incredibly difficult in small, manoeuvrable fighters; in large aircraft with masses more momentum, it would be harder still. Again, the regulators wouldn't even countenance it, for sure.
Flying in another aircraft's vortices is not "free lift", it's turbulence...!
Wings already adapt to wind conditions; they use flaps and slats (some settings are specifically designed for gusty or strong-wind conditions) and that's all that's needed, thanks.
At least they are moving towards "flying-wing" designs forms, though; that's a good start.